Autophagy protects the rotenone-induced cell death in alpha-synuclein overexpressing SH-SY5Y cells

作者：Dadakhujaev Shorafidinkhuja; Noh Hae Sook; Jung Eun Joo; Cha Joon Yung; Baek Seon Mi; Ha Ji Hye; Kim Deok Ryong^*

来源：Neuroscience Letters, 2010, 472(1): 47-52.

DOI：10.1016/j.neulet.2010.01.053

• Parkinson's disease
• Rotenone
• Cell death
• Autophagy
• alpha-Synuclein
• HIF-1 alpha

Loss of dopaminergic cells induced by alpha-synuclein accumulation in substantia nigra causes the development of Parkinson's disease (PD). To date, although autophagy has been implicated in the pathology of PD, the molecular mechanism is still unclear. To study the role of autophagy in PD pathogenesis, we established stable SH-SY5Y cell lines overexpressing wild-type or mutant alpha-synuclein proteins (A30P or A53T). Overexpression of mutant alpha-synuclein induced some protein aggregates and cell death in the absence of drug. LC3-II protein, a critical marker for autophagy, was produced in an autophagy-dependent manner. The rotenone-induced cell death was interrupted by autophagy stimulation. Autophagy activation also restored the mitochondrial membrane potential (MMP) impaired by rotenone in mutant alpha-synuclein expressing cells. Additionally, autophagy activation significantly relieved rotenone-induced ROS accumulation and HIF-1 alpha expression in neuronal cells expressing mutant alpha-synuclein proteins. These findings indicate that autophagy plays an important scavenger role against harmful influence of toxic protein aggregates produced in rote none-treated cells.

• 出版日期2010-3-12